Locking device for miners&#39; lamps.



o. M. MLLER.. LOCKING DEVICE POR MINERS LAMPS.

APPLIGATION FILED MAR. 3, 1908.

921,868. Patented May 18,1909.

3 SHEETS-SHEET 1.

n rm: Namzrs PE1-sns ca.. wAsumwuN. n. c.

APPLICATION FILED MAB. 3. 190B.

Patented May 18, 1909.

8 SHEETS-SHEET 2.

WiTM/ess es:

1HE NoRRls PETERS co, wAsmNzrraN, n. c,

0. M. MLLER.

LOOKING DEVIBPOB. MINERS' LAMPS.

APPLIUATION FILED MAB. a, 19o`l- 921,868. Patented May 18, 1909.

3 SHEETS-SHEET 3.

fig. 9

OTTO MAX MLLER, OF GELSENKIRCHEN-SCHALKE, GERMANY.

LOCKING DEVICE FOR MINERS LAMPS.

Specification of Letters Patent.

Application filed March 3, 1908.

Patented May 1S, 1909.

Serial No. 418,965.

To all whom it may concern:

Be it known that I, OTTO MAX MLLER, a citizen of Germany, residing at Gelsenkirchen-Schalke, Germany, have invented new and useful Improvements in Locking Device for Miners7 Lamps, of which the following is a specification.

This invention relates to a miners lamp which is secured against opening by unauthorized persons. Furthermore, the construction is such that the light becomes automatically extinguished when the lamp is unlocked, and that it can be lighted only in its locked condition.

1n the accompanying drawings: Figure 1 is a vertical section, partly broken, of a miners lamp provided with my improved locking device; Fig. 2 a cross section on line 2 2, Fig. 1; Fig. 3 a side view, partly in section, of the lighting device; Fig. 4L a vertical section on line A-B, Fig. 2; Fig. 5 a vertical section, partly broken away, of a modification; Fig. 6 a plan thereof with the upper part removed; Fig. 7 a detail section of part of the igniting device shown in Figs. and 6; Fig. 8 a similar section, showing the parts in a different position; Fig. 9 a vertical section through a further modication, and Fig. 10 a cross section on line 10-10, Fig. 9.

Upon the cylindrical fuel reservoir 10 of the lamp is mounted a collar 30 which is embraced by a rotatable ring or chimney holder 11 provided with inwardly extending inclined projections 12 adapted to engage a corresponding outwardly extending projection 13 of collar 30, parts 12 and 13 constituting collectively a screw lock. From ring 11 extend upwardly a suitable number of posts 141 connected on top by the usual cap, (not shown), and adapted to hold chimney 15 in position. To collar 30 is secured a flanged disk or cover 30a, forming the top of reservoir 10, and provided with a burner tube 16 which is vertically adjustable by screw spindle 17 and contains wick 16a.

Within a diametrically extending recess or groove 3010 of cover 30a, is received a slide or plunger 23 provided with a pair of outwardly extending pins or prongs 25 and 26 passing through corresponding bores of collar 30 and adapted to enter a pair of recesses 27 of ring 11. Slide 23 is slotted as at 28 for the passage of tube 16, and is influenced by a spring 24 which tends to push slide 23 inward. Opposite recesses 27 ring 11 is enlarged as at 18, to form a chamber or spring housing. Through eniargement 18 passes a locking bolt 21 provided with an inwardly extending foot or projection 22 received within groove 30, and adapted to bear against slide 23. Within chamber 18 is mounted a stud 18a, to which a substantially U-shaped spring 19, of magnetizable material, is secured. To the free ends of the latter are attached magnetizable shoes 20 adapted to enter a pair of opposed notches 21a of bolt 21.

1t will be seen that when the bolt is withdrawn from the lamp, spring 24 will push slide 23 inward, to retract prongs 25, 26 from recesses 27, so that ring 11 may be partially rotated upon collar 30. 1n this way projections 12 are withdrawn from projections 13, so that ring 11 may be removed from lamp 10. 1f it is desired to lock the lamp, ring 11 is brought into the proper position and bolt 21 is inserted into ring 11, whereby the free ends of spring 19 with shoes 2O arespread by the beveled edges 21b of bolt 21, shoes 20 finally entering notches 21u. During this operation slide 23 has been advanced by foot 22 of bolt 21, so that prongs 25, 26 have entered recesses 27, to firmly lock the lamp.

For opening the lamp, a powerful horseshoe magnet is used, which is so held that its poles are placed opposite the free ends of spring 19. T he latter will thus be distended, so as to withdraw shoes 20 from recesses 21a, whereupon bolt 21 is partly pressed outward by spring-influenced slide 23. Bolt 21 may now be removed by hand, so that the top of the lamp may be taken 0H in the manner described.

in order to admit the air necessary for combustion to the flame, 1 provide ring 11 with a series of ducts 29 that open into an inner channel 3()C of ring 11, whence the air passes through apertures 31 of collar 30 into an annular recess 30( formed between collar 3() and cover 30a. Recess 30d is partly closed on top by a wire gauze 32 through which the air must pass before reaching the flame.

In order to automatically extinguish the lamp when the same is opened, a cap 33 is provided which is adapted to close the upper opening' of wick tube 16. Cap 33 is riveted at 33a, to a lever 34 pivoted at 34h to the wick tube guide above lamp cover 30a. A lower extension 34 of this lever is received V39 against the igiiiting' tape.

within a correspoi'iding recess 35 of slide lt will thus be seen that when the lamp is opened and slide 23 is retracted, lever 34a will be automatically tiltedV so as to place cap 33 over tube 16. TNhen the lamp is closed, the advancing' slide 23 will so swing lever 34a, that cap 33 clears tube lGQ The lighting arrangement which l prefer to use is similar to that shown in British patentNo.4 23,229, of 1905. It comprises essentially a reciprocating and rotatable pin 38 mounted ina vertically reciprocating casing 37, and provided with an inverted U- shaped friction pin 39 adapted to ignite the tape, (not shown). From casing 37 extends laterally a projection or nose 40 which engages the lower side of slide 23 when the lamp is closed.v In this Iway casing 37 and pin 38 are prevented from being raised while the pin is rotated, so that the necessary friction is produced between the rougliened edge 39a of head 39, and the igniting tape. lf the lamp is unlocked, recess 41 of slide becomes alined with noselO, so that upon the raising of pin 38, nose Ll0 cannot obtain the necessary hold on the lower surface of slide 23, to thereby draw edge 39l of head As the device is so constructed that for its operation coii siderable friction is necessary between edge 39al andthe tape, the ignition of the lamp will thus be impossible, while the same is open.

comprising essentially ar rotatable spindle 4t2, to the upper end of which a crown 43 is secured. Stem 42 is provided with a flattened section l5 which is adapted to enter a Figs. 58, illustrate an igniting device nl2, and A13 are replaced by slides il? and 47,

corresponding recesses of oval chimney hopper 1l. rl`he` lamp is thus normally locked by the three pairsof pins and the bolt 2l, while upon tliewithdrawal Vof `the l latter, in iiiaiiiiei' hereinabove described,tlie pins also clear holder 1l, so that the lamp.-

inay be opened.

claim:

l. A iiiiners lamp comprising a reservoir,

a chimney holder removably secured thereto, a spring-iniuenced plunger carried by ythe reservoir and adapted to lock the chimney holder to said reservoir, and a bolt for actuatinO' the lun'er said boltv beinv' also.

D D 9 D adapted to lock the chimney-holder to the reservoir, substantially as specified ifi ininers lamp comprising a'reservoir` having a grooved cover, a chimney holder removably Ysecured thereto, a springfinfluenced plunger slidablein thecover-groove Y.and adapted to engage .therchimney holden and a bolt Vadapted to engage the plunger, substantially as specified.

A ininers lamp comprising a reservoir, a wick, means carried by theieservoir for igniting the wick, a ,chimney holder remov-A ably secured to the` reservoir, Va ,plunger adapted to lock the holder to they reservoir,

and ineanscontrolled by the plunger for rendering the Yigniting deviceinoperative when the holder is unlocked from the reservoir,

substantially as specilied.

vSigned by ine this eighteenth day. of'February 1908.

oT'ro MAX MLLER:-

lVi tnesses PETER Linnen, VILHELM FLAscnic. 

